I thought I remembered a prior discussion that the Billboard AC charts are known for having slower ascents than some of the genre-specific charts - but I could be wrong. "Hallelujah" had a quick climb over the holidays - but I think that may have been the nature of the content, shortened season, and other holiday music. Not sure, but I am hoping that a slow ascent and longevity helps make this a bigger hit than a quick rise and fall would have otherwise.